RSPH3 and primary ciliary dyskinesia: Subfertility caused by sperm motility defects have also been reported for male PCD patients with mutations in the radial spoke genes DNAJB13 (DnaJ heat shock protein family (Hsp40) member B13), RSPH3 (radial spoke head 3 homolog) and RSPH9 [13, 27, 37, 48, 62].